Superman [Clark Kent; Kal-El]; Batman [Bruce Wayne]; Perry White; Mineral Man
Synopsis
Superman and Batman use a machine to temporarily switch bodies. Batman has no control over Superman's body, breaking some containers and exposing Superman's mind to red kryptonite before switching back to his own body. This results in Superman having some weird dreams focusing on Batman's villains.
Supergirl [Linda Danvers; Kara Zor-El]; Frank Davis (first appearance); Ethel Davis (first appearance); X-2-Y [Dick Malvin] (first appearance); Treasury Secretary Quiggly (first appearance)
Synopsis
While exploring space, Supergirl finds another planet that is similar to Earth, except that it is run by teens. She is tricked into running for President.